PRODUCTS

API L80 Oil casing

Oil country tubular goods (OCTG) are mainly used for the drilling of oil and gas wells as well as the transportation of oil and gas. Oil casings are primarily used to support the wellbore during drilling and after well completion, so as to ensure the smooth progress of the drilling process and the normal operation of the entire oil well after completion. Oil casings are the lifeline for maintaining the operation of oil wells. Due to different geological conditions, the stress state downhole is complex, with tensile, compressive, bending, and torsional stresses acting on the pipe body comprehensively, which places high requirements on the quality of the casings themselves.
StandardAPI 5CT, GB, ISO11960, GOST
MaterialH40, J55, K55, N80-1, N80-Q, L80-1,L80-9Cr, L80-13Cr, P110, Q125 etc.
Outside Dia(mm)114.3MM -508MM(4 1/2"--20")
Wall Thickness(mm)5.21MM-16.13MM(9.5PPF--133PPF)
LengthR1, R2, R3
Thread TypesSTC, LTC, BTC, XC and Premium connection
InspectionNDT and other related rules specified in API 5CT and 5B
PackagingLoose package, Packaged in bundles(3Ton Max) , bundled pipes with two slings at the both end for easy loading and discharging, End with Plastic caps or as per requirement
Application1. Fluid pipe
2. Power Plant
3. Structure pipe
4. High and low pressure Boiler tube
5. Seamless pipe /tube for petroleum cracking
6. Conduit pipe
7. Scaffolding pipe pharmaceutical andship,building etc.
Payment30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy or 70%T/T balance, 100% Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L in 15 days
Advantages1. Reasonable price with excellent quality
2. Abundant stock and prompt delivery
3. Rich supply and export experience, sincere service



Our petroleum pipelines are manufactured from high-grade carbon and micro-alloyed steels, delivering exceptional yield strength and collapse resistance. Through precision wall thickness control and full-length quench & tempering treatment, the pipes achieve uniform mechanical properties with superior resistance to sulfide stress cracking (NACE MR0175 compliant). Our product range covers casing, tubing, and line pipes with various threading types and anti-corrosion coatings (FBE/3LPE). All products strictly comply with API 5CT/5L, ISO 11960 and customer-specific standards, ensuring reliability in drilling, extraction and transmission applications.





Our oil pipelines are produced using state-of-the-art JCOE forming technology and submerged arc welding (SAW) processes. The manufacturing process features automated ultrasonic testing systems, full-length X-ray inspection, and computer-controlled hydrostatic testing up to 30 MPa. Additionally, the production line includes in-line heat treatment for stress relief and precision end-facing equipment, ensuring strict dimensional tolerances (OD ±0.5%, WT ±5%) are consistently met.





In order to ensure product quality, we will arrange professional personnel to check product quality, packaging, weight, hardness, etc., according to customer requirements of product specifications, looking for high-quality and cheap cooperative factories in China, to provide customers with one-stop procurement services and quality assurance.





Excellent packaging: waterproof paper and plastic film + iron cover + at least three strapping straps + strapping straps fixed on iron or wood pallets can effectively protect products from corrosion and various climate changes during transportation. Generally speaking, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. We have worked with many experienced shipping companies for a long time to find the most suitable mode of transportation for you.


Q: Are You Manufacture or Trade Company?
A: We are the professional manufacturer of pipeline products located in Tianjin,China. Welcome to contact us and visit our factory before you place orders.
Q: How do you guarantee the quality?
A: We can send free samples to you, we can accept third-party testing.
We also have test certificate, every batch goods will be testing before shipment, and the testing report will delivery to you with your goods.
Q: Can I get free samples?
A: Of course you can. We can produce according to your samples or technical drawings. Contact us by whatsapp or email to get free samples and you will get the sample after 3-7 working days.
Q: What is the MOQ? 
A: If you are scheduling to place a small quantity order or trial order, feel free to contact us, we can meet your requirements.
Q: Can you OEM or ODM?
A: Yes, we have a strong developing team. The products can be made according to your request

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